Apparatus for manufaturing segments for use in the construction of tunnels or shafts.



'APPARATUS'FOR MANUFACTURING SEGMENTS FOR USE IN THE CONSTRUCTION OFTUNNELS OR SHAFTS.

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,No. 793,552. PATENTED JUNE 27, 1905. L. TREUHEIT.

APPARATUS FOR MANUFACTURING SEGMENTS FOR USE IN THE CONSTRUCTION OFTUNNELS OR SHAFTS.

PL T10 LE AP IOA N PI 1) SEPT 19 1904 a SHE T 2.

No. 793,552. PATENTED JUNE 27. 1905.

' L. TREUHEIT.

APPARATUS FOR MANUFACTURING SEGMENTS FOR USE IN THE CONSTRUCTION OFTUNNBLS 0R SHAPTS.

APPLICATION FILED SEPT. 19. 1904. a SHEETS SH T a.

omyv/ fra 4 NITED STATES Patented June 27, 1905.

PATENT OFFICE.

LEONHARD TREUHEIT, OF DUSSELDORF, GERMANY.

I APPARATUS FOR MANUFACTURING SEGMENTS FOR USE IN THE CONSTRUCTION OFTUNNELS OR SHAFTS.

SPECIFICATION forming part of Letters Patent No. 793,552, dated June 27,1905.

Application filed September 19, 1904- Serial No. 225,085.

. To all whom, it may concern:

Be it known that I, LEONHARD TREUI-IEIT, a subject of the GermanEmperor, residing at Simrockstrasse 56,Dusseldorf, Germany, haveinvented certain new and useful Improvements in Apparatus forManufacturing Segments to be .used in the Construction of Tunnels orShafts, of which the following is a full, clear, and exact description.

The present invention relates to an apparatus for forming mechanicallyand without the manual labor usually employed molds for casting segmentswhich can be used in the construction of tunnels and shafts in mines orfor underground railroads.

In the accompanying drawings, forming part of this specification, Figure1 is a front elevation of the apparatus, partly in section, themolding-board and rammer bein omitted to show clearly the molding-roller and the bed. Fig. 2 is a side elevation. Fig. 3 shows in section thetop segment inverted with the molding-roller in elevation. Fig. 4 is afront elevation of the ramming device. Fig. 5 is a front elevation ofthe machine similar to Fig. 1, but with the molding-board and rammer;and Fig. 6 is a plan view of the machine, Fig. 5, with the molded bed.

The apparatus is composed of two iron upright frames, being connected atthe top by a bridging 1, said frame 2 3 being arranged on wheels runningin grooves of rails 4. The frames 2 3 are each provided with a device bywhich the bearings 7, carrying the roller 5 or 6, may be adjustedvertically, so as to place the roller 5 more or less high over the bedof sand. An electromotor 8 on the frames serves to actuate a rammingdevice secured to the bridge 1 and to move the apparatus to and fro uponthe rails 4 simultaneously.

The device for adjusting the bearings 7, supporting the rollers 5 or6,consists of the screwrods 9, which are rotated by a hand-wheel 10 andbevel-gears 11, as is easily understood from the drawings.

The mechanism for moving the moldingmachine backward and forwardconsists, essentially, of the motor 8, which is projecting laterallyfrom the upright 3, and of a shaft 12, carrying at its lower end a Worm13, gearing into the worm-wheel 15 on the rear axle 14. A second worm 16on the shaft 12 of the motor engages the teeth of a worm-wheel 18,

keyed upon the axle 17 of the rollers, and thus rotates the rollerswhile the machine is traveling over the bed of sand. The ramming devicesecured to the bridging 1 in front of the roller 5 is likewise operatedby the motor 8 by means of bevel-wheels 19 and a shaft 20, carrying anumber of eccentrics, as shown, or of cranks, cams, or similar suitablelifting elements. Eccentric-straps 22 around the eccentrics on the shaft20 and rods 23 connect the rammer 24 with the shaft 20, and suitableconnections 21 are used on the rods 23 to adjust the rammer inconvenient height above the bed. The rammer 24 corresponds in form tothe bed of sand 25 and to the top flask 26.

Adjustable mold-board carriers 27 are fitted to the frames 2 and 3 andcarry the moldboard 33, conforming to the outline of the bed to beshaped. To insure a smooth running of the machine over the bed, runningsliding pieces 28 project from the frames 2 and 3 inwardly and on oneside may be made adjustable by means of a screw 29 and a handwheel 30.The thickness of the sections to be cast is regulated by rings 31, whichcan be pushed on both ends of the rollers, whereby by the employment ofa thick ring, for example, thin segments are produced, owing to theseats 32, which remain at'both sides of the bed of sand 25 when rolledand on which the top flask rests, being thus made correspondinglydeeper. Reverscdly, by putting thin rings on thicker segments areformed.

The apparatus works in the following manner: The long bed of sand 25,composed of fireproof material formed in the usual manner between therails,is at first corresponds ingly shaped by the mold-board 33.Directlybehind this mold-board the rammer 24, having acorrespondingly-rounded shape, acts upon the sand during its verticalreciprocation, whereupon the roller 5 of a profile similar to thesegment presses the bed down and produces a smooth surface. To form thetop segment 26, the roller 5 is removed and an egg-shaped roller 6, Fig.3, is placed in the apparatus and the machine is guided over the mass,forming the top segment, which when ready is turned and placed upon theready bed 25. The inward edge in the profile of the flange, joints ofthe sections which cannot be produced by the process of rolling, isformed by hand, and a division of the segments is effected by suitablecores placed on the bed. When the mold is finished, the top flasks areturned, placed on the bed of sand, and the casting may begin.

What I claim as my invention, and desire to secure by Letters Patent, is

1. Apparatus for manufacturing segments to be used in the constructionof tunnels and shafts, composed of a frame having on thesides mold-boardcarriers for securing thereto the ends of a mold-board, and having arammer of the proper cross-section suspended on a shaft provided withmeans to communicate r to the rammer a vertical reciprocating mo= tionand havin a convex roller in adjustable bearings, to ml and even thebedding.

2. Apparatus for manufacturing segments to be used in theconstruotion'of tunnels and shafts, composed of a frame having on theOSKAR KUNZELL. l l

